The Mitro password manager for individuals and groups records user names and passwords as users log in to new sites, synchronizes them across devices, and lets users share them with others. It has extensions for Chrome, Firefox, and Safari, mobile apps for iOS and Android, and a server to do the synchronization.

The client and server side software is being released under the GPL (general public license) on code sharing site Github.

EFF said that while the Mitro team is joining Twitter, Mitro itself will continue as an independent corporation. It said Mitro had committed that it would fund the continued operation of its servers at least till the end of this year. "The service will continue to operate as-is for the foreseeable future," Mitro said.

Mitro is described by EFF as "already quite a mature and usable system." It said it didn't recommend downloading the Android version of the app for the time being because of security issues arising from its use of the Android clipboard.